add TaggedExpression #3294

Job	Run time
Pylint	1m 22s
Typos	4s
Mypy	1m 29s
Documentation	1m 26s
Tests for downstream project arraycontext	3s
Conda Examples	1m 52s
Tests for downstream project meshmode	4s
Conda Pytest (ubuntu-latest)	3m 50s
Tests for downstream project grudge	3s
Conda Pytest with Intel CL	4m 0s
Tests for downstream project pytential	4s
Conda Pytest without arg check	3m 58s
Conda Pytest (macos-latest)	4m 0s
Tests for downstream project pytato	4s
Conda Pytest Twice (for cache behavior)	5m 24s
Validate CITATION.cff	7s
Ruff	5s
Tests for downstream project Firedrake	19m 12s
	47m 7s

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